Three yrs. ago for me. At first, car lights at night were awful, but that corrected itself after a while. My night vision isn’t good, but it wasn’t before the surgery either. If I’m tired, the monovision factor (and I’m not sure the surgeon didn’t get my dominant eye mixed up)doesn’t kick in like I wish it would. If rested, it does. - I won’t rate it for fear of influencing someone else either way.